Active wiper system for an automobile

ABSTRACT

The present invention relates to a wiper system for an automobile and more particularly, to an active wiper system which secures a good front visual range by changing the track of the wiper blade of a passenger&#39;s side and positioning pertinently the wiper blade in each range of the track, thus preventing rainwater wiped by the wiper blade of a passenger&#39;s side from dropping down to the front of a driver&#39;s side while driving in the rain.

FIELD OF THE INVENTION

[0001] The present invention relates to a wiper system for an automobile and more particularly, to an active wiper system which secures a good front visual range by changing the track of the wiper blade of a passenger's side and positioning pertinently the wiper blade in each range of the track, thus preventing rainwater wiped by the wiper blade of a passenger's side from dropping down to the front of a driver's side while driving in the rain.

BACKGROUND OF THE INVENTION

[0002] Generally, the conventional wiper system used for wiping off rainwater on the windshield glass in order to ensure visibility of a driver is defective in that the rainwater wiped by the wiper blade of a passenger's side drops down at a time onto windshield glass of a driver. Thus, the visibility of a driver is considerably restricted as shown in FIG. 1. Especially, while driving in a heavy rain, such a conventional wiper system puts a driver in danger due to limited visibility.

SUMMARY OF THE INVENTION

[0003] Accordingly, in order to be free from the above-mentioned problem occurring in the conventional wiper system, an object of the present invention is to provide the active wiper system for an automobile which secures a good front visual range by changing the track of the wiper blade of a passenger's side and positioning pertinently the wiper blade in each range of the track, thus preventing rainwater wiped by the wiper blade of a passenger's side from dropping down to the front of a driver's side while driving in the rain.

BRIEF DESCRIPTION OF THE DRAWINGS

[0004]FIG. 1 is a schematic view of a general wiper system.

[0005]FIG. 2 is an exploded view showing the components of the active wiper system in accordance with the present invention.

[0006]FIG. 3 is a perspective view of the active wiper system in accordance with the present invention.

[0007]FIGS. 4a-4 b are sectional views showing the operation of an active wiper system in accordance with the present invention wherein FIG. 4a is a sectional view of the active wiper system just before the wiper blade is reversed to move up pivotally; and FIG. 4b is a sectional view of the active wiper system just before the wiper blade is reversed to move down pivotally.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] The present invention is described in detail with reference to the accompanying drawings as set forth hereunder.

[0009] The active wiper system of the present invention comprises a rod 14, a linkage 18, a slider 20, and a rail 21.

[0010] The present invention is characterized in that (i) the rod 14 capable of moving vertically with elastic supporting of spring 13 is inserted into a wiper body 12 and connected with the lower end of wiper blade 11 of a passenger's side; (ii) the linkage 18 is connected perpendicularly to the rod 14 at the lower end of the rod 14 and supported by the stopper 16 which is fixed on a wiper rod 15; (iii) the slider 20 is sliding between an opening 19 disposed in the linkage 18 so as to move whole part of the linkage 18 vertically; and (iv) the rail 21 leads the movement of the slider 20.

[0011] The present invention is also characterized in that the slider 20 comprises a stay 22 disposed in the opening 19 of the linkage 18 and a roller 25 which is installed at the lower end of the stay 22 and rolls on the rail 21.

[0012] The present invention is further characterized in that the rail 21 on which the guide groove 24 is formed has a rising curvilinear section at the rear portion of the rail 21.

[0013] The present invention is further characterized in that the stopper 16 has a ball-connection with the wiper rod 15 by means of the ball fixed to the lower end of the stopper 16.

[0014] The present invention is further characterized in that the stay 22 is elastically supported by two stay springs 23 which are mounted at both ends of the stay 22.

[0015] The present invention is described in more detail hereinafter.

[0016]FIG. 2 represents an exploded view showing the components of the active wiper system in accordance with the present invention and FIG. 3 represents a perspective view of the active wiper system.

[0017] The rod is designated as reference numeral 14.

[0018] As shown in FIGS. 2 and 3, the rod 14 is inserted into the wiper body 12, wherein the upper end of the rod 14 is integrally connected to the lower end of the wiper blade 11 and the lower end is perpendicularly integrated with the linkage 18, thus the rod 14 moves with the wiper blade 11 in the upward and downward directions depending on the movement of the linkage 18. In particular, the restoring force of a rod spring 13 mounted between the linkage 18 and the rod 14 allows the rod 14 to return to its original position.

[0019] The linkage is designated as reference numeral 18.

[0020] The linkage 18 as a power-transmitting member includes the opening 19 in the middle of the linkage 18, of which one end is perpendicularly integrated with the lower portion of the rod 14 and the other end is connected on the wiper rod 15 by a means of the stopper 16. The linkage 18 moves vertically by the movement of the slider 21 mounted in the opening 19 in the middle of the linkage 18, thus allowing up-and-down movement of the wiper blade 11 including the rod 14. The stopper 16 accepts sufficiently all the movements of the linkage 18 by using the ball 17 mounted under the stopper 16.

[0021] The slider is designated as reference numeral 20.

[0022] The slider 20 consists of the stay 22 which is disposed in the opening 19 of the linkage 18 and the roller 25 which is installed at the lower end of the stay 22, wherein the stay 22 is supported for elastic movement by two stay springs 23 mounted at both ends of the stay 22.

[0023] The rail is designated as reference numeral 21.

[0024] The rail 21 for guiding the roller 25 is fixed on the wiper rod 15. The guide groove 24 is formed on the rail 21 with rapid rising curvilinear section at the rear portion. As the roller 25 rides along with the rising curvilinear section of the rail 21, the linkage 18 and the rod 14 begin to simultaneously rise. Therefore, the wiper blade 11 can be detached from the windshield glass. In addition, it is preferred that the length of the rising curvilinear section should not exceed one third of full length of the rail 21.

[0025] The operational effect of the active wiper system in accordance with the present invention will be delineated in detail as follows.

[0026]FIG. 4a is a sectional view showing the operation of the active wiper system just before the wiper blade 11 moves. In this stage, the wiper blade 11 and the rod 14 are placed at the normal position where the wiper blade 11 is attached closer to the windshield glass surface due to the elastic force of the rod spring 13 and the roller 25 of the slide 20 is also on the flat section of the rail 21.

[0027] When the roller 25 of the slider 20 in the linkage 18 rolls along with the guide groove 24 of the rail 21 from the beginning portion to two third of the rail 21, the wiper blade 11 can wipe off rainwater on the surface of the windshield glass because the roller 25 is on the flat section of the rail 21. On the other hand when the roller 25 starts to move up to the rising curvilinear section of the rail 21, the wiper blade 11 is detached from the windshield glass.

[0028] That is, when the roller 25 of the slider 20 starts to move along with the end portion of the guide groove 24 where is the rising curvilinear portion, the wiper blade 11 is also moving as detached from the windshield glass. Therefore, the rainwater wiped falls down before it reaches the front of a driver's side. This active wiper system, thus, provides the large and good visual range for the driver while driving in the rain.

[0029] Reversely, the wiper blade 11 begins its descent to downside with detached form when the roller 25 rolls down the rising curvilinear portion of the rail 21. Thereafter, since the roller 25 rolls down the flat portion, it finishes its descent with closely attached form, resulting in clear and wide visual range for the driver.

[0030] Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. 

What is claimed is:
 1. An active wiper system for an automobile comprising: a rod capable of moving in upward and downward directions, wherein said rod is integrally connected with one end of wiper blade ahead of a passenger's seat, and inserted into a wiper body with elastic supporting of a rod spring; a linkage connected perpendicularly with the lower end of the rod and supported by a stopper which is fixed on a wiper rod; a slider sliding between an opening disposed in the linkage so as to move the whole part of the linkage vertically; and a rail leading the movement of the slider.
 2. The active wiper system according to claim 1, wherein said slider comprises a stay disposed in the opening of the linkage and a roller which is installed at the lower end of the stay and rolls on the rail.
 3. The active wiper system according to claim 1 or claim 2, wherein said rail includes a guide groove having a rising curvilinear section at the rear portion of the rail.
 4. The active wiper system according to claim 1, wherein said stopper has a ball-connection with the wiper rod bop means of the ball fixed to the lower end of the stopper.
 5. The active wiper system according to claim 2, wherein said stay is elastically supported by two stay springs at both ends of the stay. 